Trustworthiness-based Group Communication Protocols

In distributed applications, a group of multiple process are cooperating with each other by exchanging messages in underlying networks. A message sent by each process has to be delivered to every process in a group. In this paper, we discuss a protocol for reliably, efficiently transmitting messages to every operational process in a group. We assume that each process can send messages to only neighboring processes like wireless networks and scalable peer-to-peer (P2P) overlay networks. Here, a process sends a message to its neighboring processes and then each neighboring process forwards the message to its neighboring processes. In this paper, we propose a trustworthiness-based group communication protocol where only trustworthy neighboring processes forward messages. In order to reduce the number of messages, a trustworthy neighboring process is a process which can more reliably forward messages. We discuss how to obtain the trustworthiness of a process in networks and forward messages to every process through trustworthy processes. We discuss a reactive type of protocol to reliably deliver message to a destination process m a wireless network.